Wanted to drop you a line and welcome you to this site, and of course you are welcome here. I think you will find this site a great support for you with wonderful people and great resource information. I am so sorry to hear that you are having such a tough time of it right now. Many of the medications used to treat RA are the same as used with SLE and plaquenil is one of the drugs used upon initial dx. so that is good you are on it. It can take up to 6 months to work properly so don't get discouraged if you don't see improvement right away. It is common for many of us to have more than one dx. so having RA and SLE is quite common here.
You did mention that you had been on Celebrex. Are you still on this medication? Celebrex is a sulfa based drug and many people with lupus cannot tolerate Sulfa drugs. Make sure if you are still on this that you discuss it with your rheumy.
Hang in there and I know things will get better after all you have that wonderful family to enjoy. Take care of you and look forward to seeing other posts from you.